While the young X-Men train relentlessly under the guidance of Professor X, elsewhere Magneto has gathered his own group of mutants with the intent of attempting world domination. They are siblings Wanda and Pietro Maximoff, better known as the Scarlet Witch and Quicksilver, Mastermind and the Toad. Soon, the X-Men must confront the Magneto's Brotherhood as they attempt to conquer a small nation. Professor X is caught in a booby trap and suffers injuries that threaten to end his role as leader of the X-Men. Wanda and Pietro show some noble attributes, but remain in Magneto's service. 23 pages.

First appearances of the Brotherhood of Evil Mutants, Toad, Mastermind, Scarlet Witch and Quicksilver.

Reprinted in Marvel Super-Heroes (Vol 2) #23 and X-Men: The Early Years #4.